u 



OBSERVATIONS ON THE DEVELOPMENT OF R.VlA BATIS. 



Figs. 7, 8, 9. 



above, ami 



a a', figs. 8 and 9, pectoral fin ; 5, figs. 7 and 9, facial disk ; c, figs. 8 and 9, ventrals ; c, fig. 7, dorsals ; d, figs. 



7 and 9, anal ; e, figs. 8 and 9, gill fringes. 



Fig. 10. Head of figure 6, enlarged ; a, nasal lobe ; b, facial disk ; c, upper lip. 



Fi*. 11. Newly-hatched skate; a, yelk-sack in the cavity of the abdomen, connecting with the intestine, 



all 



dorsals in the preceding figures 



